Sensitivity of methods for estimating breeding values using genetic markers to the number of QTL and distribution of QTL variance.
Genet Sel Evol
; 42: 9, 2010 Mar 22.
Article
en En
| MEDLINE
| ID: mdl-20302681
ABSTRACT
The objective of this simulation study was to compare the effect of the number of QTL and distribution of QTL variance on the accuracy of breeding values estimated with genomewide markers (MEBV). Three distinct methods were used to calculate MEBV a Bayesian Method (BM), Least Angle Regression (LARS) and Partial Least Square Regression (PLSR). The accuracy of MEBV calculated with BM and LARS decreased when the number of simulated QTL increased. The accuracy decreased more when QTL had different variance values than when all QTL had an equal variance. The accuracy of MEBV calculated with PLSR was affected neither by the number of QTL nor by the distribution of QTL variance. Additional simulations and analyses showed that these conclusions were not affected by the number of individuals in the training population, by the number of markers and by the heritability of the trait. Results of this study show that the effect of the number of QTL and distribution of QTL variance on the accuracy of MEBV depends on the method that is used to calculate MEBV.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Cruzamiento
/
Sitios de Carácter Cuantitativo
/
Modelos Genéticos
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Genet Sel Evol
Asunto de la revista:
BIOLOGIA
/
GENETICA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Países Bajos